Roughly a year ago I had an issue with grey screen on Windows Server 2022 with Citrix Virtual Apps and Desktops. A script helped clear out some registry key but there seem to still be problems with sessions with grey screens. Check out my post from last year: https://www.ajni.it/2023/03/citrix-virtual-apps-and-desktops-2203-grey-screen-connectionfailure-in-eventviewer/

There is a new fix that seems to be better and does not clear any registry keys. Instead it activates Citrix Universal DLL Injection. After upgrading the VDA, make sure this value is set:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CtxUvi]
“UviEnabled”=dword:00000001

This helped in my environment.

References:

https://discussions.citrix.com/topic/412451-just-grey-screen-instead-of-published-desktop/page/7/?sortby=votes

By default on an on prem Exchange 2013/2016/2019 environment, internal server names are displayed in the message header analyzer, which you would not want to expose externally.

This is how it would look like:

To remove that information, execute this command in the Exchange Powershell. Make sure you have the right Send Connector Name.

Get-SendConnector “Internet” | Remove-ADPermission -User “NT Authority\ANONYMOUS LOGON” -ExtendedRights ms-Exch-Send-Headers-Routing

And now this is how it looks like:

References:

https://practical365.com/remove-internal-exchange-server-names-ip-addresses-message-headers/

Having performance problems when deleting one single file or folder? File Explorer takes 2-3 seconds to “calculate” something before deleting? Deleting automatic destinations might help you out. I had a case where this file was 4MB big, which is a lot for only text/paths.

Delete everything under:

C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Recent\AutomaticDestinations

The big file in question is f01b4d95cf55d32a.automaticDestinations-ms. You might want to delete this file only. But I deleted everything.

References:

https://answers.microsoft.com/en-us/windows/forum/all/file-explorer-freezes-every-time-i-try-to-delete-a/95dc1a91-6a28-487a-8741-5569226e9a36

https://www.tenforums.com/tutorials/175934-how-backup-restore-quick-access-pinned-folders-windows-10-a.html

Having grey screen issues with CVAD 2203+ and higher on Windows Server 2022 Terminal server? I had this issue occurring on Citrix 2212. Try running this script. It might help you out. Do a VM backup or snapshot before running the script, just to be sure.

$iddHwId = “VEN_5853&DEV_1003”
$pnpDispDevPath = “HKLM:\SYSTEM\CurrentControlSet\Enum\SWD\RemoteDisplayEnum”

try
{
    $iddDevEntries = Get-ChildItem -Path $pnpDispDevPath -ErrorAction Stop| Where-Object Name -Match $iddHwId
}
catch
{
    Write-Output “Failed to query remote ID device entries”
    Write-Output $_
    return
}

if ($iddDevEntries.Count -eq 0)
{
     Write-Output “No remote ID device entries found.”
     return
}

$iddDevEntries | ForEach-Object {
    
    $devName = ($_.Name -Split “\\”)[-1]
    
    try
    {
        Remove-ItemProperty -Path $_.PsPath * -ErrorAction Stop
        Write-Output “Cleared values for $devName”
    }
    catch
    {
        Write-Output “Failed to clear values for $devName”
        Write-Output $_
    }
}

This saved my day:

https://discussions.citrix.com/topic/417832-cvad-connectionfailure-after-install-ltsr-2203-cu2-on-server-2022/page/3/

One or a few users are not able to connect to their mailbox using the newest Outlook version there is? Well the issue might be TLS 1.2 not being active on the user’s side.

Just set this registry key and you should be good to go:

HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings

or

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings

DWORD SecureProtocols 00000A80

HEX A80 or decimal 2688 enables TLS 1.0, 1.1 and 1.2, while decimal 640 only enables TLS 1.0 and 1.1.

References:

https://www.anoopcnair.com/disable-enable-tls-1-0-1-1-internet-explorer-ie/